I read the firmware, it's build with the Arduino IDE and PWM for the heater element is bitbanged and updated from the main loop. Meaning it can easily get stuck

I read the firmware, it's build with the Arduino IDE and PWM for the heater element is bitbanged and updated from the main loop. Meaning it can easily get stuck sending a MQTT message over wifi when it loses connection, causing the heater to possibly be left on indefinitely.